Corrigendum to: Updating and Validating the U.S. Veterans Affairs Frailty Index: Transitioning From ICD-9 to ICD-10. Issue 2 (17th July 2021) - Cheng, David; DuMontier, Clark; Yildirim, Cenk; Charest, Brian; Hawley, Chelsea E; Zhuo, Min; Paik, Julie M; Yaksic, Enzo; Gaziano, J Michael; Do, Nhan; Brophy, Mary; Cho, Kelly; et al.